Nabu Casa Home Assistant Connect ZWA-2 vs Sonoff Dongle-PZG23

The Sonoff Dongle-PZG23 on value, costing far less with a slightly better owner rating for the same Z-Wave 800 role. The Nabu Casa Home Assistant Connect ZWA-2 wins on antenna strength, at +3.38dBi against 2 dBi.

Antenna gain, and therefore range. The Nabu Casa Home Assistant Connect ZWA-2 has a stronger antenna at +3.38dBi, which helps reach distant Z-Wave devices in a large house. Otherwise both are Z-Wave 800 USB controllers.

Less than you might think. Z-Wave is a mesh, so mains-powered devices repeat the signal. The extra gain pays off mainly in large properties, outbuildings or where few repeaters sit between the controller and the far end.

Yes. Both are dedicated Z-Wave 800 controllers, so they support the current generation's improved range, battery efficiency and security features.

Both work with Home Assistant. The Nabu Casa Home Assistant Connect ZWA-2 comes from the company behind Home Assistant, so its firmware and support align closely with that project, which some users value for peace of mind.

Users with a large or difficult property who need the stronger antenna to hold the mesh together, or who prefer buying their controller from the Home Assistant team.

Most users: it delivers the same Z-Wave 800 controller role at a much lower price with a good owner rating, which is plenty when the mesh has mains-powered repeaters.